Freeze the Fire

Warp to Dragon Roost Island and sail one square south to
Fire Mountain.
Get it marked on your chart, then get sort of close to the island
and shoot an arrow at the flames spewing out of the
top to stop the fire.

This starts a 5 minute
timer,
so quickly go onto the island and go up. If you came here
by going south from Dragon Roost Island, there should be a ledge
straight ahead that you can climb onto from the water.
Grapple a feather from the kargaroc then kill it with the
boomerang, then start heading up.
When you reach a fork in the path, go right.
Sidle across the ledge, keep climbing, then fall into the hole at the top.

Get the Power Bracelets

Inside, boomerang the keese. Jump across the platforms on the lava,
boomeranging more keese on the way.
The lava platforms disappear, so hurry.
You can kill the magtails with a parry or just make them roll
up and kill them with your sword.
The chest will appear. Open it to receive the Power Bracelets.

Turn around, pick up the giant stone head,
and throw it wherever.
Go in and kill the keese, then enter the sparkly light to go up.

Get a Piece of Heart on Outset Island

Now that you have the Power Bracelets, you have access to another
piece of heart.
First, warp to Outset Island. Go up to the pig pen. If you put
the three wandering pigs into the pen, there will be a huge
black pig in the pen now. If you didn't put the pigs into the
pen, read The Game
Begins to find out how.

Pick up the giant pig and take him out of the pen. Be careful not
to drop him or throw him into water, because it is very difficult
to get him out. Carry him across to the area near the grass-cutting
guy's field. Put the pig down on the place with two
black spots on the ground. Scatter some all-purpose bait on
the black spot on the right, and the pig will dig up a Piece of
Heart.

Learn a New Song on Headstone Island

From Outset Island, sail east to Headstone Island.
Go to the little beach and use a hyoi pear. There is a Piece of
Heart on top of the island as well as rupees, so fly around collecting
them and return to Link to obtain the items.

Now go up the beach and pick up and throw the big stone head. Inside,
stand in front of the slab and use the Wind Waker.
Press right on the D-stick to switch to 6/4 time.
You will learn the Earth God's Lyric and a clue to finding the
next sage.